Improvement in pipe-molding machines



2 Sheets-Sheet l P. SHIOKLE, Pipe Molding Machine.

.No. 209,428. Patented-500i, 29, 1878.

' INVENTUH. m fiamdowmt N4 PEIERs, PHQTO-LITMOGRAPHER, WASHINGTONv D C.

v 2 Sheets-Sfieet-Z.

F. SHIGKLE. Pipe Molding Machine. -No. 209,428. Patented Oct.l29, 1878.

AT-TEST; lNV ENTO R:

w f9 (m.md

UNITED STATES PATENT QFFIGE.

FREDERICK SHIGKLE, OF ST. LOUIS, MISSOURI, ASSIGNOR OF TWO-THIRDS HISRIGHT TO THOMAS HOWARD AND JOHN WV. HARRISON, OF SAME PLACE.

V IMPROVEMENT IN PIPE-MOLDING MACHINES.

Specification forming part of Letters Patent No. 209.428, dated October29, 1878; application filed August 14, 1878.

To all whom it may concern:

Be it known that I, FREDERICK SHIOKLE, of St Louis, Missouri, have madea new and useful Improvement in Molding Pipes and other long heavycastings, of which the following is a full, clear, and exactdescription,

reference being had to the annexed drawing,

' other long heavy castings.

I- have heretofore made certain improvements in molding pipes of thekind referred to, described more fully in Letters Patent N 0. 148,094,granted March 3, 12574.

In the construction alluded to the flask is suspended vertically uponthe pit-wall, and the operation is as follows: The flask being properlyclamped and adjusted, the pattern is lowered into the flask and the sandproperly rammed. The pattern is then hoisted out of the flask. Thelatter is then transferred to the drying-oven, from which, after beingdried, it is brought back and suspended again upon the pit-wall. Thecore is then inserted and the pipe cast. The flask is then opened andthe pipe hoisted out of the pit.

Now, the pipes being long and heavy, the flasks, patterns, and otherparts of the apparatus are correspondingly cumbersome and difficult tohandle. The pipes must be lifted and the patterns lowered and lifted adistance equal to the length of the pipe, and the flasks in beingtransferred to and from the drying oven, must, on an average, be swungone-third around the pit.

In practice, large cranes operated by steam are needed for lifting andmoving the various parts of the apparatus, and considerable time isrequired for each stage of the operation.

It is the aim of the present improvement to provide means by which theoperation of moldbedded in the sand as to cause the entire flask toadhere to and be lifted with the pattern' when the latter is hoisted forremoval. In such case the flask has to be jarred loose from thepattern-a troublesome operation, and often the cause of thedisintegration of the sand within the flask, requiring the latter insuch event to be rammed a second time.

To facilitate the molding and casting of the pipes, the present flask ismade with two or more compartments, so that two or more pipes can becast at the same time and I overcome the difficulty arising" from theadherence of the flask to the patterns, and at the same time provide forthe ready insertion and re moval of the patterns from the flask, byyokin g the patterns of the several compartments to gether and loweringand lifting them in a clus ter, for I have ascertained in practice thatwhen two or more patterns are yoked together and embedded as described,and the attempt to lift them is made, the lifting strain does not comeupon all the patterns simultaneously, and the patterns do not start fromthe sand simultaneously, but slightly in advance of each other, orsuccessively, and sufficiently so to enable the weight or inertia of theentire flask (which is increased in weight according to the number ofthe compartments therein) to re= sist the friction of the patterns indetail. The practical result of this is that not only can all thepatterns be removed from the flask at a single lift, but they arestarted from the sand with less difficulty even than in withdrawing asingle pattern from the singlechamber flask, and the flask never riseswith the patterns.

Referring to the drawing, A represents a section of the wall inclosingthe pit such as pipes are usually cast in. B represents the flask,suspended upon the wall. The flask is made in two parts, I) b, hingedtogether at b I), and made to be fastened together by the clamps 1) 11 Orepresents the bottom of the flask, hinged and clamped to the main part.The flask is preferably made with re-entering angles b b in its sides,and it is divided by means of the vertical partition 12 into twocompartments, B B, each of which is of suitable proportions to enable apipe to be molded therein.

In operation, the flask is suspended upon the wall in the usual manner,and as shown. A double or two-part (the two parts being connected by thedetachable yoke 61) pattern, D, is then, and by one operation, loweredinto the flask, the parts at d entering the compartments B B,respectively. .The sand is then rammed around the parts d d, and thenthe latter, and by one hoisting, is withdrawn from the flask.

In practice, the part connecting the pattern with the hoisting apparatusdoes, as above stated, exert its strain upon both patterns exactlysimultaneously, and, in consequence, the double pattern is easilyremoved. The flask is then transferred to the drying-oven, dried, andbrought back again to the pit-wall in the usual manner. The cores arethen yoked together and lowered into the compartments B B, respectively,and a pipe cast in each of the compartments at one casting. 7

'When the flask has more than two compartments the parts 61 d of thepattern are correspondingly increased in number, and are yoked togetherby a yoke of suitable shape for holding the parts (I d in properposition in the compartments.

I claim 1. The combination of the flask B, having the compartments B B,and the pattern D, having the parts at (l, united at or near their topsby a yoke, d, consisting of two rings and a connecting-bar,substantially as described.

2. The combination of the flask B, having the compartments B B, and thepattern D, having the parts d d and the yoke 01, substantially asdescribed.

Witness my hand.

FREDERICK SHIOKLE.

Witnesses OHAs. D. MOODY, THOMAS HOWARD.

